[PATCH 1/3] drm/crtc: Add property for aspect ratio

[Vandana Kannan]

On Apr-07-2014 3:33 PM, Kannan, Vandana wrote:
> Added a property to enable user space to set aspect ratio.
> This patch contains declaration of the property and code to create the
> property.
> 
> Signed-off-by: Vandana Kannan <vandana.kannan at intel.com>
> Cc: dri-devel at lists.freedesktop.org
> ---
This patch series is being submitted as discussed in
http://lists.freedesktop.org/archives/dri-devel/2014-April/056593.html

-Vandana
>  drivers/gpu/drm/drm_crtc.c | 31 +++++++++++++++++++++++++++++++
>  include/drm/drm_crtc.h     |  2 ++
>  2 files changed, 33 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index d8b7099..6cd34ad 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -139,6 +139,12 @@ static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
>  	{ DRM_MODE_SCALE_ASPECT, "Full aspect" },
>  };
>  
> +static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
> +	{ HDMI_PICTURE_ASPECT_NONE, "Automatic" },
> +	{ HDMI_PICTURE_ASPECT_4_3, "4:3" },
> +	{ HDMI_PICTURE_ASPECT_16_9, "16:9" },
> +};
> +
>  /*
>   * Non-global properties, but "required" for certain connectors.
>   */
> @@ -1334,6 +1340,31 @@ int drm_mode_create_scaling_mode_property(struct drm_device *dev)
>  EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
>  
>  /**
> + * drm_mode_create_aspect_ratio_property - create aspect ratio property
> + * @dev: DRM device
> + *
> + * Called by a driver the first time it's needed, must be attached to desired
> + * connectors.
> + */
> +int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
> +{
> +	struct drm_property *aspect_ratio;
> +
> +	if (dev->mode_config.aspect_ratio_property)
> +		return 0;
> +
> +	aspect_ratio =
> +		drm_property_create_enum(dev, 0, "aspect ratio",
> +				drm_aspect_ratio_enum_list,
> +				    ARRAY_SIZE(drm_aspect_ratio_enum_list));
> +
> +	dev->mode_config.aspect_ratio_property = aspect_ratio;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
> +
> +/**
>   * drm_mode_create_dirty_property - create dirty property
>   * @dev: DRM device
>   *
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index c061bb3..99bb6ed 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -797,6 +797,7 @@ struct drm_mode_config {
>  
>  	/* Optional properties */
>  	struct drm_property *scaling_mode_property;
> +	struct drm_property *aspect_ratio_property;
>  	struct drm_property *dirty_info_property;
>  
>  	/* dumb ioctl parameters */
> @@ -966,6 +967,7 @@ extern int drm_mode_create_dvi_i_properties(struct drm_device *dev);
>  extern int drm_mode_create_tv_properties(struct drm_device *dev, int num_formats,
>  				     char *formats[]);
>  extern int drm_mode_create_scaling_mode_property(struct drm_device *dev);
> +extern int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
>  extern int drm_mode_create_dirty_info_property(struct drm_device *dev);
>  extern const char *drm_get_encoder_name(const struct drm_encoder *encoder);
>  
>